I don't know why the Houdini subforum is locked. Maybe there was no support for Houdini for some time? Anyway, you are welcome to ask question about the Houdini connectivity plugin, also in the general section. Only problem is, that it can be that very few or no user here use it.... I am using Cinema4D and Maya.

Yeah, I am really surprised, there isn't more going on in regards to RF on the interwebs. Any idea why that is?

I think there was a noticeable change when the price structure of RF was changed from several hundred to over 1K$ with annual upgrades around 800$. After that, and now without learning edition, RF has become a tool for professional artists who make money with it. These customers are more likely to contact Nextlimit directly for support and are less prone to make tutorials on youtube for free... Actually, providing free tutorials helps hobbyists, but also users of pirated software. After all, VFX software is a niche within a niche market and the user base is always relatively small.